Introduction Sometimes you might need to upload or download a folder or file to/from your server and the folder / file can be of any size. It can take a lot of time to upload a folder or file to the server. Also it is a lot faster to move one large compressed file rather …
Continue reading “How to zip or unzip files and folders using command line on Ubuntu server”
You would frequently require to download files from the server, but sometimes a file can be very large in size and it may take a long time to download it from the server. Downloading large file from server using FTP is time consuming. You can download the file from the server, using command line, which …
Continue reading “How to download large files from Linux server using command line”
What is Let’s Encrypt ? Let’s Encrypt is a service provided by the ISRG (Internet Security Research Group). It is a free, automated, and open certificate authority (CA), run for the public’s benefit. It is based on the following key principles : Free Automatic Secure Transparent Open Cooperative To begin the installation of the Free …
Continue reading “How to install LetsEncrypt free SSL certificate on Nginx (Ubuntu 14.04, 12.04)”
PHP 7 was released in December 2015. A stable version of PHP 7 is now out and has been getting a good response from the development community. Some of the key new features / improvements in PHP 7 are : 1. Performance The performance of PHP 7 has almost doubled that of PHP 5.6. The …
Continue reading “How to upgrade from PHP 5.x to PHP 7 (WordPress site + Nginx)”
If you want to upgrade your PHP 5.3 to PHP 5.6 running on Ubuntu 12.04 with nginx, you need to follow these steps : Step 1: Add the PPA repository for PHP 5.6 sudo add-apt-repository ppa:ondrej/php If you are logged in as the root user, you can leave out ‘sudo’ from the above command If …
Continue reading “How to upgrade PHP 5.3 to PHP 5.6 on Ubuntu 12.04 with Nginx”
Varnish is a reverse web proxy accelerator that caches the HTTP contents. It can speed up requests by a factor of 500-1000 times. By caching and saving CPU time and database requests for content, varnish is able to server hundreds of consecutive requests per second. In order to purge or clear Varnish cache, you can …
Continue reading “How to purge / clear Varnish cache for a single URL”
What is a Swap Partition ? A linux swap partition becomes useful when your server’s RAM gets full. When your RAM gets full, then your swap partition will act as a RAM for your other applications. But does not this mean this is a great alternative to having a large RAM, because a swap partition …
What is a Swap Partition ? A linux swap partition is like an overflow for your system’s RAM. If your RAM gets full, then your swap partition will run the other applications. So does this mean this is a great alternative to having a large RAM ? No ! because a swap partition on a …
Continue reading “How to create a swap partition on Ubuntu 12.04 VPS”
What is Varnish Varnish is a caching HTTP reverse proxy / web application accelerator. It is installed infront of Apache or Nginx on a server and it can increase the speeds by upto 300-1000 times, depending on the server architecture and configuration. Prerequisites You need have a user with root / sudo privileges for a …
Continue reading “How to setup Varnish + Nginx with WordPress on Ubuntu 12.04”
Sometimes while installing WordPress plugins, you might come across a message to install / enable Mcrypt extension for PHP. Mcrypt is an interface which supports a wide range of block algorithims. It support Algorithims like DES, TripleDES, GOST, OFB etc. Note : The Mcrypt extension relies on the ‘libmcrypt’ extension, which is not maintained since …
Continue reading “How to install and enable Mcrypt extension for PHP + Nginx”